Research on Measurement Method of GNSS Receiver Antenna Phase Center Offset Based on Geometric Constraints

LI Jing-jing; LI Lian-fu; WANG De-li; ZENG Jiu-sun; CAI Jin-hui; MIAO Dong-jing; LI Jian-shuang

doi:10.3969/j.issn.1000-1158.2023.07.18

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Acta Metrologica Sinica ›› 2023, Vol. 44 ›› Issue (7) : 1121-1127. DOI: 10.3969/j.issn.1000-1158.2023.07.18

Research on Measurement Method of GNSS Receiver Antenna Phase Center Offset Based on Geometric Constraints

LI Jing-jing¹,LI Lian-fu²,WANG De-li²,ZENG Jiu-sun¹,CAI Jin-hui¹,MIAO Dong-jing²,LI Jian-shuang²

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Abstract

By analyzing the relationship between the phase center and the geometric center of the GNSS receiver antenna, a measurement method for the phase center offset of GNSS receiver antenna based on geometric constraints was proposed. The method was measured by a combination of two or more antennas, using the known coordinates of the antenna geometric center in the east-north-top coordinate, the horizontal offset and relative vertical offset of the phase center of all antennas can be solved in only two observation periods. The phase center stability analysis experiment with different observation periods and the phase center offset measurement experiment under different antenna combinations and different antenna position conditions were carried out by using choke antennas. The experimental results show that the observation period of the high-precision GNSS receiver antenna phase center offset measurement is 24h. The repeatability of the horizontal offset of the phase center of the antenna is not more than 0.13mm, and the repeatability of the relative vertical offset is 0.67mm.

Key words

metrology / GNSS receiver antenna / phase center offset / east-north-top coordinate / geometric constraint

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LI Jing-jing,LI Lian-fu,WANG De-li,ZENG Jiu-sun,CAI Jin-hui,MIAO Dong-jing,LI Jian-shuang. Research on Measurement Method of GNSS Receiver Antenna Phase Center Offset Based on Geometric Constraints[J]. Acta Metrologica Sinica. 2023, 44(7): 1121-1127 https://doi.org/10.3969/j.issn.1000-1158.2023.07.18

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